{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:SH27BEIRA6BXLR3WVJXMNPAGQL","short_pith_number":"pith:SH27BEIR","canonical_record":{"source":{"id":"1510.04995","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DC","submitted_at":"2015-10-16T19:43:00Z","cross_cats_sorted":["cs.PF"],"title_canon_sha256":"cdf06b697a651bacf1b23e511f9b463d6f912f72a0eebf88b1a0ad6881a88812","abstract_canon_sha256":"79f9801b6151d8d585291cfaf8aaffcdb98a3116c56df0367c9ff1537c8f8475"},"schema_version":"1.0"},"canonical_sha256":"91f5f09111078375c776aa6ec6bc0682e22566226a4a2c4164709677201e2399","source":{"kind":"arxiv","id":"1510.04995","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.04995","created_at":"2026-05-18T01:30:00Z"},{"alias_kind":"arxiv_version","alias_value":"1510.04995v1","created_at":"2026-05-18T01:30:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.04995","created_at":"2026-05-18T01:30:00Z"},{"alias_kind":"pith_short_12","alias_value":"SH27BEIRA6BX","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"SH27BEIRA6BXLR3W","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"SH27BEIR","created_at":"2026-05-18T12:29:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:SH27BEIRA6BXLR3WVJXMNPAGQL","target":"record","payload":{"canonical_record":{"source":{"id":"1510.04995","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DC","submitted_at":"2015-10-16T19:43:00Z","cross_cats_sorted":["cs.PF"],"title_canon_sha256":"cdf06b697a651bacf1b23e511f9b463d6f912f72a0eebf88b1a0ad6881a88812","abstract_canon_sha256":"79f9801b6151d8d585291cfaf8aaffcdb98a3116c56df0367c9ff1537c8f8475"},"schema_version":"1.0"},"canonical_sha256":"91f5f09111078375c776aa6ec6bc0682e22566226a4a2c4164709677201e2399","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:30:00.120212Z","signature_b64":"Cyf7PyX4hb30vd2MnyjgKZwvS43zdsSyvesejL90pYmuE2jkWfEYk9KXb0HvA2dmrBuPuSoCgi7MGh9XvuXaDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"91f5f09111078375c776aa6ec6bc0682e22566226a4a2c4164709677201e2399","last_reissued_at":"2026-05-18T01:30:00.119487Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:30:00.119487Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1510.04995","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:30:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"T4LZOA5enmWw5C3+QlUXMcAYiT+t/p+YOUmhgDjDscKNHM2C0phROwbluYY83C8XbhWZF/QfkQQyhMdmc71yBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T19:55:07.067451Z"},"content_sha256":"6844e8424c8fdc7e60b5d3016e654bd4b3274a5b732931ff37ea697d08029cbe","schema_version":"1.0","event_id":"sha256:6844e8424c8fdc7e60b5d3016e654bd4b3274a5b732931ff37ea697d08029cbe"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:SH27BEIRA6BXLR3WVJXMNPAGQL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Multi-dimensional intra-tile parallelization for memory-starved stencil computations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.PF"],"primary_cat":"cs.DC","authors_text":"David Keyes, Georg Hager, Hatem Ltaief, Tareq Malas","submitted_at":"2015-10-16T19:43:00Z","abstract_excerpt":"Optimizing the performance of stencil algorithms has been the subject of intense research over the last two decades. Since many stencil schemes have low arithmetic intensity, most optimizations focus on increasing the temporal data access locality, thus reducing the data traffic through the main memory interface with the ultimate goal of decoupling from this bottleneck. There are, however, only few approaches that explicitly leverage the shared cache feature of modern multicore chips. If every thread works on its private, separate cache block, the available cache space can become too small, an"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.04995","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:30:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cFPw+PMYH60lPjoV6/Z/lcWrUhesdloqqUY2xVZVY71CiRg4mz8HWDu0oEIU3DFZQ2lseHdDwfKptZyUmyORCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T19:55:07.068132Z"},"content_sha256":"f4d09466beaab4a8b49ad81b9aa9e393edc7c62881a94ebad8fd168f773997e9","schema_version":"1.0","event_id":"sha256:f4d09466beaab4a8b49ad81b9aa9e393edc7c62881a94ebad8fd168f773997e9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SH27BEIRA6BXLR3WVJXMNPAGQL/bundle.json","state_url":"https://pith.science/pith/SH27BEIRA6BXLR3WVJXMNPAGQL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SH27BEIRA6BXLR3WVJXMNPAGQL/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-25T19:55:07Z","links":{"resolver":"https://pith.science/pith/SH27BEIRA6BXLR3WVJXMNPAGQL","bundle":"https://pith.science/pith/SH27BEIRA6BXLR3WVJXMNPAGQL/bundle.json","state":"https://pith.science/pith/SH27BEIRA6BXLR3WVJXMNPAGQL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SH27BEIRA6BXLR3WVJXMNPAGQL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:SH27BEIRA6BXLR3WVJXMNPAGQL","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"79f9801b6151d8d585291cfaf8aaffcdb98a3116c56df0367c9ff1537c8f8475","cross_cats_sorted":["cs.PF"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DC","submitted_at":"2015-10-16T19:43:00Z","title_canon_sha256":"cdf06b697a651bacf1b23e511f9b463d6f912f72a0eebf88b1a0ad6881a88812"},"schema_version":"1.0","source":{"id":"1510.04995","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.04995","created_at":"2026-05-18T01:30:00Z"},{"alias_kind":"arxiv_version","alias_value":"1510.04995v1","created_at":"2026-05-18T01:30:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.04995","created_at":"2026-05-18T01:30:00Z"},{"alias_kind":"pith_short_12","alias_value":"SH27BEIRA6BX","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"SH27BEIRA6BXLR3W","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"SH27BEIR","created_at":"2026-05-18T12:29:42Z"}],"graph_snapshots":[{"event_id":"sha256:f4d09466beaab4a8b49ad81b9aa9e393edc7c62881a94ebad8fd168f773997e9","target":"graph","created_at":"2026-05-18T01:30:00Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"Optimizing the performance of stencil algorithms has been the subject of intense research over the last two decades. Since many stencil schemes have low arithmetic intensity, most optimizations focus on increasing the temporal data access locality, thus reducing the data traffic through the main memory interface with the ultimate goal of decoupling from this bottleneck. There are, however, only few approaches that explicitly leverage the shared cache feature of modern multicore chips. If every thread works on its private, separate cache block, the available cache space can become too small, an","authors_text":"David Keyes, Georg Hager, Hatem Ltaief, Tareq Malas","cross_cats":["cs.PF"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DC","submitted_at":"2015-10-16T19:43:00Z","title":"Multi-dimensional intra-tile parallelization for memory-starved stencil computations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.04995","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:6844e8424c8fdc7e60b5d3016e654bd4b3274a5b732931ff37ea697d08029cbe","target":"record","created_at":"2026-05-18T01:30:00Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"79f9801b6151d8d585291cfaf8aaffcdb98a3116c56df0367c9ff1537c8f8475","cross_cats_sorted":["cs.PF"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DC","submitted_at":"2015-10-16T19:43:00Z","title_canon_sha256":"cdf06b697a651bacf1b23e511f9b463d6f912f72a0eebf88b1a0ad6881a88812"},"schema_version":"1.0","source":{"id":"1510.04995","kind":"arxiv","version":1}},"canonical_sha256":"91f5f09111078375c776aa6ec6bc0682e22566226a4a2c4164709677201e2399","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"91f5f09111078375c776aa6ec6bc0682e22566226a4a2c4164709677201e2399","first_computed_at":"2026-05-18T01:30:00.119487Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:30:00.119487Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Cyf7PyX4hb30vd2MnyjgKZwvS43zdsSyvesejL90pYmuE2jkWfEYk9KXb0HvA2dmrBuPuSoCgi7MGh9XvuXaDg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:30:00.120212Z","signed_message":"canonical_sha256_bytes"},"source_id":"1510.04995","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6844e8424c8fdc7e60b5d3016e654bd4b3274a5b732931ff37ea697d08029cbe","sha256:f4d09466beaab4a8b49ad81b9aa9e393edc7c62881a94ebad8fd168f773997e9"],"state_sha256":"609fd2328f7462822252532e2f33d9efd35f23f04a246a4aa8cf12e85f6e48e9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5PGWZ0EKUyEBwrqgZocb8fBLRM+ZsEVoYXuiaQUrnw3d8K8AGCpDgDDG0DWUMc/od13XB2BTADwXE1t2ZFxjDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T19:55:07.071990Z","bundle_sha256":"b3a699220e3ddc105b8589522a6b27b2d7fa870784ad3bf55b85dd2bae97e6bb"}}